function fParallel(fblck,nblck,whoiam,ThisMatlab,fname)
% In a parallelization context, this function is launched on slave
% machines, and acts as a wrapper around the function containing the
% computing task itself.
%
% INPUTS
%  fblck [int]          index number of the first thread to run in this
%                       MATLAB instance
%  nblck [int]          index number of the first thread to run in this
%                       MATLAB instance
%  whoiam [int]         index number of this CPU among all CPUs in the
%                       cluster
%  ThisMatlab [int]     index number of this slave machine in the cluster
%                       (entry in options_.parallel)
%  fname [string]       function to be run, containing the computing task

% Copyright (C) 2009 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.

global funcName

funcName=fname;

warning off;
diary off;

delete( [fname,'_',int2str(whoiam),'.log']);

diary( [fname,'_',int2str(whoiam),'.log']);

    
% configure dynare environment
dynareroot = dynare_config();

% Load input data
load( [fname,'_input']) 

if exist('fGlobalVar'),
  globalVars = fieldnames(fGlobalVar);
  for j=1:length(globalVars),
    eval(['global ',globalVars{j},';'])
  end
  struct2local(fGlobalVar);
end

% On UNIX, mount the master working directory through SSH FS
if isunix & Parallel(ThisMatlab).Local==0,
    system(['mkdir ~/MasterRemoteMirror_',fname,'_',int2str(whoiam)]);
    system(['sshfs ',Parallel(ThisMatlab).user,'@',fInputVar.MasterName,':/',fInputVar.DyMo,' ~/MasterRemoteMirror_',fname,'_',int2str(whoiam)]);
end

% Special hack for MH directory
if isfield(fInputVar,'MhDirectoryName') & Parallel(ThisMatlab).Local==0,
    if isunix,
        fInputVar.MhDirectoryName = ['~/MasterRemoteMirror_',fname,'_',int2str(whoiam),'/',fInputVar.MhDirectoryName];
    else
        fInputVar.MhDirectoryName = ['\\',fInputVar.MasterName,'\',fInputVar.DyMo(1),'$\',fInputVar.DyMo(4:end),'\',fInputVar.MhDirectoryName];
    end
end

fInputVar.Parallel = Parallel;
% Launch the routine to be run in parallel
tic,
fOutputVar = feval(fname, fInputVar ,fblck, nblck, whoiam, ThisMatlab);
toc,
if isfield(fOutputVar,'OutputFileName'),
    OutputFileName = fOutputVar.OutputFileName;
else
    OutputFileName = '';
end

if(whoiam)
    
  % Save the output result
  save([ fname,'_output_',int2str(whoiam),'.mat'],'fOutputVar' )
  
  % Inform the master that the job is finished, and transfer the output data
  if Parallel(ThisMatlab).Local
    delete(['P_',fname,'_',int2str(whoiam),'End.txt']);
  else
    if isunix,            
      for j=1:size(OutputFileName,1),
        system(['scp ',OutputFileName{j,1},OutputFileName{j,2},' ',Parallel(ThisMatlab).user,'@',fInputVar.MasterName,':',fInputVar.DyMo,'/',OutputFileName{j,1}]);
      end
      system(['scp ',fname,'_output_',int2str(whoiam),'.mat ',Parallel(ThisMatlab).user,'@',fInputVar.MasterName,':',fInputVar.DyMo]);
      system(['ssh ',Parallel(ThisMatlab).user,'@',fInputVar.MasterName,' rm -f ',fInputVar.DyMo,'/P_',fname,'_',int2str(whoiam),'End.txt']);
      system(['fusermount -u ~/MasterRemoteMirror_',fname,'_',int2str(whoiam)]);
      system(['rm -r ~/MasterRemoteMirror_',fname,'_',int2str(whoiam)]);      
    else
      for j=1:size(OutputFileName,1),
        copyfile([OutputFileName{j,1},OutputFileName{j,2}],['\\',fInputVar.MasterName,'\',fInputVar.DyMo(1),'$\',fInputVar.DyMo(4:end),'\',OutputFileName{j,1}])
      end
      copyfile([fname,'_output_',int2str(whoiam),'.mat'],['\\',fInputVar.MasterName,'\',fInputVar.DyMo(1),'$\',fInputVar.DyMo(4:end)]);
      delete(['\\',fInputVar.MasterName,'\',fInputVar.DyMo(1),'$\',fInputVar.DyMo(4:end),'\P_',fname,'_',int2str(whoiam),'End.txt']);
    end
  end
end

disp(['fParallel ',int2str(whoiam),' completed.'])
diary off;

exit;